Platform-scale



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R. RESTALL. Platform Scale.

No. 239,843. Patented April 5,188l.

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Platform Scale.

'No. 239,843. Patented April 5,1881.

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UNITED STATES PATENT OFFICE.

ROBERT RESTALL, OF CHELSEA, MASSACHUSETTS.

PLATFORM-SCALE.

SPECIFICATION forming part of Letters Patent No. 239,843, dated April 5, 1881.

Application filed October 11, 1880.

To all whom it may concern Be it known that 1, ROBERT REsTALL, of Chelsea, county of Suffolk, and State of Massachusetts, have invented an Improvement in Weighing-Scales, of which the following description, in connection with the accompanying drawings, is a specification.

This invention relates to scales, and is herein shown as embodiedin a scale for hay, coal, &c.; bu the invention is also applicable to all platforan-scales.

In ordinary scales of the class first mentioned the platform-timbers are placed directly above the compound lever, which is connected at one end with the scale-beam rod, and the main or platform levers, at their front ends, rest directly upon the upper edges or ends of the compound lever. Such construction necessitates a deep pit for the reception of the operative parts of the scale below the platform.

In my invention I have so constructed the compound lever as to occupy a position above and across the usual platform-timbers, and I have placed the inner ends of the main or platform levers below the compound lever, and in loops suspended from pivots on the said compound lever, and that part of the compound lever which is not connected with the beam-rod has its end most remote from the beam-rod extended outward beyond the outer bearings for that part of the compound lever which is connected with the beam-rod, where it serves to support the loops, which, in turn, receive the inner ends of that pair of main or platform levers most remote from the beam-rod.

The construction herein described enables me to use apit of about fifteen inches, instead of the deeper pits heretofore common.

The main timbers of the platform are joined together by means of two metal bars, having at each end a suitable hook or projection, to enter a loop of one of the main levers which support the platform. The main levers, four being employed, are suspended at their rear ends by means of strong metal loops, and the said four levers, arranged outside of and parallel with the platform-timbers, are connected in pairs at their inner ends with loops suspended from below the compound beam-rod lever, to be hereinafter described, it preferably occupying a position between the platform-timbers and (Model.)

the under side of the planking of the platform, and above-the inner ends of the main levers.

My invention consists, chiefly, in this compound lever arranged above the platform-timbers and inner ends of the main levers, and its combination with other parts of the scale mechanism, as will be fully set forth and claimed hereinafter.

Figure 1 represents a top view of the platform portion of a scale embodying my invention, a portion of the planking at the left being omitted to show the construction of the parts below the planking, and someof the said parts are represented in section. Fig. 2 is a vertical section of a scale embodying my invention, the section being taken along the line 00 m, Fig. 1. Fig. 3 is a vertical section of Fig. 1 on the line 3 y, and Fig. 4 is an enlarged detail of one of the loops h and the nose-iron and pin-pivot.

The pillars a, pillar-cap a, scale-beam a and beam-rod a are and may be of any usual construction. The platform-timbers b, which are extended lengthwise ofthe scale, arejoined by means of the metal rods 1), each having at each end a suitable hook or projection, 2, to enter a metal loop, b swung, hung, or pivoted upon a pivot, c, of one of the platform-levers d. These levers d, at their outer ends, havea pivot, 3, to enter a lever-supporting metal loop, 6, hung on a piy'ot, 4, connected with a corneriron, f, or other rigid part of the frame-work of the scale. Each platform-lever, at its inner end, is provided with an adjustable nose-iron, g, having a pin-pivot, 5, that enters a recess in a metal loop, h, suspended loosely upon and extended below the V-shaped pivots l0 and 12 of the two parts of the compound beam-lever, to be referred to. There are four of these platform-levers d, all alike, and all connected with the frame-work, the metal bars I), and the compound beam-lever in like manner; so I have in the drawings marked like parts with like letters.

Referring to Fig. 1, it will be seen that the levers d are in pairs, in line with each other and parallel, and located at the sides of the platform-timbers, and that the inner end of each lever, instead of resting upon and consequently above the compound lever, is supported by a loop suspended from the compound lever, thus enabling me to place the compound lever in a plane or level elevated above the main levers, and also above the platform-timbers, so gaining space in the pit. My

compound lever, located above the inner end of the main levers and above the Mati'orm-timbers, in no way adds to the depth of the scale below the said timbers, and Iam thus enabled to make a very thin or shallow scale, which is of very great advantage, both when used as a pit-scale and as a dormant scale, such as used in stores and warehouses.

The compound beam-lever is composed of two steel levers, 17 i The lever iis connected at one end, by V-shaped pivots and loopj, with the beam-rod a, and at its other end its V- shaped pivots 6 are rested in fixedhearings of an independent stand, 7.. The lever i has its V-shaped pivots 8, at the forward end thereof nearest the beam-rod, supported in fixed bean ings of an independent stand, 73, and the V- shaped pivots 10, at its other or outer end, receive the links or loops h, that support the nose-pieces of the two main or platform levers most remote from the beam-rod, the outer end of the said lever i being bent upward and across one of the platform-timbers b. The lever 1', besides the pivots before referred to as connected with it, has V-shaped pivots 12 for two of the loops k, that support the nosepieces of the platform-levers nearest the scalebeam, and also V-shaped pivots 13, which receive the loop-rings m, one at each side, the said loop-rings also receiving the ti-shaped pivots 14 of the lever part t the loops at serving to connect the two parts '6 i of the compound lever.

The planking of a coal or hay scale is usually made three inches thick, and to enable me to employ the compound beam-lever above the platform-tin]hers, which is the chief feature of my invention, and that also without cutting them away to thus weaken them, I have omit ted one of theusual planks,n,constituting the platform immediately above the compound beam-lever, and instead of it have employed a thinner metal plate, connected atits edges with the adjacent planks, said construction affording a recess for the reception of that part of the compound beam-lever above the platformtimbers I).

The system of levers herein shown to support the platform and its parts and connect it operatively with the scale-beam, is very simple, compact, easily accessible for repairs, and is less expensive and requires less space than do ordinary scales of same capacity and purpose.

furcated, as shown clearly in Fig. 1, to receive across and between their bifurcated ends the pivots which receive the two metalloops cand 71 that support the said levers. Placing the loops in the levers in this way (see also Fig. 2) enables me to greatly economize space.

I claim- In a scale, the compound lever composed of two parts, 'i 6 having their pivots at. their inner ends resting in hearings in independent stands located between the platform-timbers, and connected together by pivots and looprings, and provided with V-shaped pivots 6 10 12, combined with the scale-beam, beamrod, bars I), platlorm-timbers placed thereon below the said compound lever, and four platforml vers, (I, having their inner ends supported by loops suspended from the pivots of the compound lever, all substantially as described.

In testimony whereoll have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT RESTALL.

Witnesses:

G. W. GREGORY, W. H. SEGSTON.

The rear ends of the platform-levers are bi- 

